Best way to check if an iPhone app is running for the first time

Question

I want to check if my iPhone app is running for the first time. I can create a file in the documents folder and check that file to see if this is the first time the app is r

Answer 1

You can use a custom category method isFirstLaunch with UIViewController+FirstLaunch.

- (BOOL)isFirstLaunch
{
    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"kFirstLaunch"]) {
        return YES;
    }
    else {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"kFirstLaunch"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        return NO;
    }
}

And when you need to use it in controller

BOOL launched = [self isFirstLaunch];

if (launched) {
//if launched
}
else {
//if not launched
}